期刊
ENVIRONMENTAL EARTH SCIENCES
卷 73, 期 10, 页码 6283-6295出版社
SPRINGER
DOI: 10.1007/s12665-014-3851-z
关键词
Metals; Diffusive gradients in thin films (DGT); Sediment/water interface (SWI); Remobilization; Flux; Passive sampler
资金
- National Critical Patented Project for Water Pollution Control and Management [2012ZX07102-004]
- China Postdoctoral Science Foundation [2013M541002]
- National Key Basic Research and Development Plan of China (973 Program) [2004CB418502]
The fine-scale profile (concentration/flux) of 14 metals at sediment/water interface (SWI) of Yingkou bay was measured by passive sampler-DGT (diffusive gradients in thin films) probe and HR-ICP-MS instrument. Fe profile in sediment porewater indicated redox reactions, which was verified by peaks at -6.75, -7.75, -8.75 and -11.75 cm. Mn profile in sediment porewater indicated redox-sensitive character with the continuous increase in profile from -3.75 to -5.75 cm, and the subsequent peaks at -6.25, -8.25, -9.75 and -11.25 cm. Both Fe and Mn profiles indicated low values at -10.25 cm, which was due to the formation of pyrite and the adsorption of Mn on it. The co-occurrence of some peaks and broad feature near peaks of trace metals and Fe/Mn at same depths of profiles indicated coupled geochemical process and co-remobilization. The diffusive fluxes of metals across SWI were also calculated and investigated.
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